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A hydraulic cylinder with a radius of 0.0281 m has a piston on the left end and a safety valve at the right end. The safety valve is a circular opening with a radius of 0.00650m, sealed with a disk. The disk is held in place by a spring (spring constant = 885 N/m) that is compressed 0.0100 m from its unstrained length. What is the magnitude of the minimum force that must be exerted on the piston in order to open the safety valve?

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